Hazardous Area Classification (HAC/ATEX)

The hazardous area classification is carried out in compliance with the indications of the reference regulations with particular reference to:

  • Standard CEI EN 60079-10-1: 2016 (31-87) – Explosive atmospheres – Part 10-1: Classification of areas – Explosive gas atmospheres
  • API RP 505 (2018)
  • Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2
  • EI 15 (2015) – EI model code of safe practice part 15: area classification for installations handling flammable fluids
  • Standard CEI EN 60079-10-2: 2016 (31-87) – Explosive atmospheres – Part 10-2: Classification of areas – Explosive dust atmospheres

The new standard CEI EN 60079-10-1: 2016, concerning the classification of areas with risk of fire and explosions due to the presence of flammable gases and liquids, essentially closes an era. The CEI 31-35: 2012 was definitively abrogated in October 2018 and with it all the application examples. The standard has been completely revolutionized.

The previous regulations indicated only the basic principles and general criteria, postponing the numerical definition of the dimensions of the hazardous classified areas (ATEX) to subsequent investigations, while the new edition includes precise references and formulas (or diagrams) to determine also these fundamental aspects of the classification.